Guys need some help in installing arduino core into ESP8266(v4)

Low Price ESP8266 WIFI module for testing !…
Low Price ESP8266 WIFI module for testing ! @USD 6.99 / 2 PCS https://www.amazon.com/dp/B07B6921MW
ESP8266 Internet clock installed at Wemos D1mini…
ESP8266 Internet clock installed at Wemos D1mini

New version ! ESP8266 wifi module with external…
New version ! ESP8266 wifi module with external antennas https://www.amazon.com/dp/B0798S41GD
Hello everyone I would to collect any ideas…
Hello everyone, I would to collect any ideas for my following project. In short: I Have nodeMCU and using as webserver for controll thermostat. It works great for me, but usually it happens that webserver (nodeMCU) freeze. And I have Read More

Building a ESP8266-01 flash adapter – Not Enough…
Building a ESP8266-01 flash adapter – Not Enough TECHIf you have more than one #ESP8266 -01 you know the struggle! It takes 10 sec to flash a new script and aboutagesto connect the cables correctly to the next WIFI board. Read More

Add a TFT Touchscreen to your #esp8266 http://bitly/1JdVmsn…
Add a TFT Touchscreen to your #esp8266 http://bit.ly/1JdVmsn come join the group!

Free ESP8266 Book by Kolban downloadable PDF http://bitly/1JK7qKQ…
Free ESP8266 Book by Kolban downloadable PDF http://bit.ly/1JK7qKQ making sure you all know about it! 317 pages!
ArduiTouch Mockup with paper pcb – future wall…
ArduiTouch Mockup with paper pcb – future wall mount touchscreen enclosure set for ESP32 & ESP8266 with 2.4 inch touch…. for NodeMCU, Wemos D1 Mini www.zihatec.de

Cooking Gas Leakage Sensor using ESP8266 and MQ6…
Cooking Gas Leakage Sensor using ESP8266 and MQ6 sensor